Love gel pro, I have a bad back which makes it uncomfortable for me to stand in one position for more than a few minutes, but my back doesn't bother me as much when I'm standing on a gel pro mat.  I've only had my gel pro mat for a couple of months, but I can tell already that it will last for years.  I've used a variety of padded kitchen mats over the years, but after a few months or a year, I've had to replace them because of obvious & unattractive signs of wear & tear.  Gel pro mats are expensive, but if the mat lasts for at least five years, the price isn't exorbitant.  Gel pro also has a generous warranty, but I haven't had to use it so, have no knowledge if it's as good as it sounds.